<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        const obj = {
            name : 'laowang',
            age: 18
        }
        Object.defineProperty(obj, 'name',{
            value: "laowang",
            writable: false,
            enumerable: false,
            configurable: false,
        })

        obj.name = 'lily'
        console.log(obj);

        Object.defineProperty(obj, "age", {
        get() {
          console.log("获取值了");
          return 18;
        },
        set(newValue) {
          console.log("值更信息了");
        },
      });

      obj.age++;
    </script>
</body>
</html>